- References
{{other ships|USS Patrol}}{{Infobox ship image| Ship image= | Ship caption=USS Patrol No. 4 during World War I
}}{{Infobox ship career | Hide header= | Ship country=United States | 1917}} | Ship name=USS Patrol No. 4 | Ship namesake=Previous name retained | Ship owner= | Ship operator= | Ship registry= | Ship route= | Ship ordered= | Ship awarded= | Ship builder=Britt Brothers, Lynn, Massachusetts | Ship original cost= | Ship yard number= | Ship way number= | Ship laid down= | Ship launched= | Ship sponsor= | Ship christened= | Ship completed=1915 | Ship acquired=Formally leased on 21 April 1917 (post-commissioning) | Ship commissioned=18 April 1917 | Ship recommissioned= | Ship decommissioned= | Ship maiden voyage= | Ship in service= | Ship out of service= | Ship renamed= | Ship reclassified= | Ship refit= | Ship struck= | Ship reinstated= | Ship homeport= | Ship identification= | Ship motto= | Ship nickname= | Ship honours= | Ship honors= | Ship captured= | Ship fate=Returned to owner 17 March 1919 | Ship status= | Ship notes=Operated as private motorboat Patrol No. 4 1915-1917 | Ship badge=
}}{{Infobox ship characteristics | Hide header= | Header caption= | Ship class= | Ship type=Patrol vessel | Ship tonnage=5 tons | Ship displacement= | Ship tons burthen= | 40|ft|0|in|m|abbr=on}} | 9|ft|0|in|m|abbr=on}} | Ship height= | Ship draught= | 2|ft|9|in|m|abbr=on}} | Ship depth= | Ship hold depth= | Ship decks= | Ship deck clearance= | Ship ramps= | Ship ice class= | Ship power= | Ship propulsion= | Ship sail plan= | Ship speed=25 knots | Ship range= | Ship endurance= | Ship test depth= | Ship boats= | Ship capacity= | Ship troops= | Ship complement=5 | Ship crew= | Ship time to activate= | Ship sensors= | Ship EW= | Ship armament=1 × machine gun | Ship armour= | Ship armor= | Ship aircraft= | Ship aircraft facilities= | Ship notes=
}} | USS Patrol No. 4 (SP-8), often rendered as USS Patrol #4, was an armed motorboat that served in the United States Navy as a patrol vessel from 1917 to 1919. Patrol No. 4 was built as a private motorboat of the same name in 1915 by Britt Brothers at Lynn, Massachusetts. She was one of five motorboats built to the same design for private owners by Britt Brothers as part of the civilian Preparedness Movement program with an understanding that they would enter U.S. Navy service in time of war, the others being Patrol No. 1, which later became USS Patrol No. 1 (SP-45); Patrol No. 2, which later became USS Patrol No. 2 (SP-409); Patrol No. 3, which never entered U.S. Navy service; and Patrol No. 5, which later became USS Patrol No. 5 (SP-29). The U.S. Navy commissioned Patrol No. 4 for service during World War I as USS Patrol No. 4 (SP-8) on 18 April 1917, formally leasing her from her owner, Guy Norman of Newport News, Virginia, on 21 April 1917. Patrol No. 4 operated in the 2nd Naval District, headquartered at Newport, Rhode Island, on coastal patrol throughout the period of the United States' participation in World War I. After post-war decommissioning, she was returned to her owner on 17 March 1919. References- {{DANFS|http://www.history.navy.mil/danfs/p3/patrol-4.htm}}
- Department of the Navy: Naval Historical Center: Online Library of Selected Images: U.S. Navy Ships: USS Patrol # 4 (SP-8), 1917-1919. Originally the civilian motor boat Patrol # 4 (1915)
- Department of the Navy: Naval Historical Center: Online Library of Selected Images: U.S. Navy Ships: USS Patrol # 1 (SP-45), 1917-1919. Originally the civilian motor boat Patrol # 1 (1916)
- NavSource Online: Section Patrol Craft Photo Archive Patrol No. 4 (SP 8)
{{Britt Brothers common design patrol boats 1915-1916}}{{DEFAULTSORT:Patrol No. 04 (Sp-8)}} 4 : Patrol vessels of the United States Navy|World War I patrol vessels of the United States|Ships built in Lynn, Massachusetts|1915 ships |